题型:判断题 草酸(H2C2O4)是二元弱酸,KHC2O4溶液呈酸性。向100mL0.2mol/L的草酸溶液中加入1.68 g KOH固体,若溶液体积不变,则对所得溶液中各粒子浓度之间的关系描述正确的是A.c(C2O42-)+c(HC2O4-)+c(OH-)=c(K+)+c(H+)B.c(C2O42-)+c(HC2O4-)+c(H2C2O4)=0.2mol/LC.c(C2O42-)<c(HC2O4-)<c(H2C2O4)D.c(H+)<c(HC2O4-)<c(C2O42-)<c(K+) 查看答案
题型:判断题 The old man is in______habit of going for______walk along______river every morning except that it rains.A.a...a...theB.the...the...aC./...a...theD.the...a...the 查看答案
题型:判断题 “大漠孤烟直,长河落日圆”表现了雄浑、开阔的意境。古诗词中有很多这样的写景诗句,请写出你最熟悉的连续两句:_____________________,_____________________ 查看答案